To find the length of Addilyn’s bedroom, we can use the formula of a rectangle’s perimeter:
Perimeter = 2 • (Length + Width)
Since we are given the perimeter and width, we can plug in our values:
40 = 2 • (8 + Length)
Next, we simplify:
40 = 16 + (2 • Length)
Then, we subtract 16 from both sides:
40 - 16 = 16 - 16 + (2 • length)
24 = 2 • length
Finally, we can divide both sides by the coefficient (2) to find that:
24 / 2 = 12
2 / 2 = 1
Therefore, the length of Addilyn’s bedroom is 12 feet.